NOUFERROUS METALLURGICAL EQUIPMENT

In this study, the determination of iron content in metallic tantalum was achieved using microwave digestion-spectrophotometry method. The experiment investigated sample treatment methods, microwave digestion solvents, and digestion temperatures. The results showed that the best effect for digesting metallic tantalum was achieved at 200℃ using hydrofluoric acid, nitric acid, and water as solvents. To prevent interference from fluoride and other impurity elements, the experiment optimized the amounts of hydrofluoric acid and tartaric acid-boric acid solution, with optimal amounts being 2mL and 30mL, respectively. Furthermore, the recovery rate of microwave digestion was calculated, ranging from 97.80% to 98.43%, indicating low sample loss and microwave digestion being more suitable as a pretreatment method for metallic tantalum. Additionally, the repeatability of iron content in metallic tantalum was tested, showing that this method has good repeatability with a relative standard deviation (RSD) of 3.89%.